You may have been wondering how your CSE is performing and how it compares to those other people are creating. The first step in sharing Custom Search metrics with you is the Most Popular listof Custom Search Engines, as defined by volume of queries. This list spans a variety of sites: large, small and across industries and topics. You'll see search engines built for techies, music lovers, sports fans, climate scientists, universities and more. Individual site owners and large organizations are seeing success with their CSEs.

We plan to update this list every couple of weeks so you can gauge the activity of the Custom Search community as well as how your CSE is performing. Stay tuned for more such metrics updates, too.